Add planner.lisp and utils.lisp
Add kcal/grams utils
Add .gitignore
Remove planner.lisp

It won't be needed at this code should be located in cl-ud2planner.lisp
instead.
Add server.lisp file
Map each day with its function and add utils
Move make-macronutrient to utils.lisp
Use let* and fix non declared variables
Export new functions

This is mostly for testing purposes, as I have no idea of how the
interface is going to look like.